To promote a recycling society, waste plastics are used as a raw material in metallurgical coke making plants. From an ecological viewpoint, new solutions for recycling waste wood are desirable. We have carried out some experiments on methods of recycling waste wood as a coke making material. Small quantities of raw waste wood were added to coal and carbonized. Influences of this addition on the thermal plasticity of coal and coke quality were investigated. Gieseler maximum fluidity of coal and coke strength both decreased when untreated, raw wood was added to coal. However the decrease in the Gieseler maximum fluidity and coke strength were smaller when waste wood was preheated at an appropriate temperature, or large pieces of raw wood were added to the coal. These experiments established methods for recycling waste wood as a coke making material.
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